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MIC28517

Microchip
Part Number MIC28517
Manufacturer Microchip
Description DC/DC Buck Regulator
Published Feb 1, 2024
Detailed Description MIC28517 70V/8A Hyper Speed Control® Synchronous DC/DC Buck Regulator with External Mode Control Features • Hyper Speed...
Datasheet PDF File MIC28517 PDF File

MIC28517
MIC28517

Overview
MIC28517 70V/8A Hyper Speed Control® Synchronous DC/DC Buck Regulator with External Mode Control Features • Hyper Speed Control® Architecture Enables: - High input to output voltage conversion ratio capability (VIN = 70V and VOUT = 0.
6V) - Small output capacitance • 4.
5V to 70V Input Voltage • 8A Output Current Capability with Up to 95% Efficiency • Adjustable Output Voltage from 0.
6V to 32V • Selectable HyperLight Load® (HLL) or Continuous Conduction Mode (CCM) Operation • ±1% FB Accuracy • Any Capacitor™ Stable: - Zero-ESR to High-ESR output capacitors • 270 kHz to 800 kHz Adjustable Switching Frequency • Internal Compensation • Built-in 5V Regulator for Single-Supply Operation • Auxiliary Bootstrap LDO for Improving System Efficiency • Internal Bootstrap Diode • Programmable Current Limit • Hiccup Mode Short-Circuit Protection • Thermal Shutdown • Supports Safe Start-up into a Pre-Biased Output • -40°C to +125°C Junction Temperature Range • Available in 32-Pin, 6 mm x 6 mm VQFN Package • AEC-Q104 Qualified (Parts with VAO Suffix) Applications • Distributed Power Systems • Communications/Networking Infrastructure • Industrial Power Supplies • Solar Energy Typical Application Circuit General Description The MIC28517 is an adjustable frequency, synchronous buck regulator that features a unique adaptive on-time control architecture.
The MIC28517 operates over an input supply range of 4.
5V to 70V and provides a regulated output of up to 8A of output current.
The output voltage is adjustable down to 0.
6V, with an accuracy of ±1%.
Hyper Speed Control architecture allows for an ultra-fast transient response, while reducing the output capacitance, and also makes high-VIN/low-VOUT operation possible.
This adaptive on-time control architecture combines the advantages of fixed frequency operation and fast transient response in a single device.
The operating mode under light load conditions is selectable; HyperLight Load mode and Continuous Conduction Mode are available.
HL...


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